Question

Fe +O2 -Fe3O4

Zn +HCl - ZnCl2 +H2

CuCl2 - NaOH - Cu(OH)2 + NaCl

Al +H2SO4 - Al2(SO4)3 +H2

Answer 1

3Fe + 2O₂ ===> Fe₃O₄

Zn + 2HCl ===> ZnCl₂ + H₂

CuCl₂ + 2NaOH ===> Cu(OH)₂ + 2NaCl

2Al + 3H₂SO₄ ===> Al₂(SO4)₃ + 3H₂

Answer 2

3Fe +2 O2 --->Fe2O3

 

Zn +2HCl --->ZnCl2 +H2

CuCl2+ 2NaOH ---> Cu(OH)2 +2 NaCl

2Al + 3H2SO4 --->Al2(SO4)3 + 3H2

Answer 3

3 Fe +2 O₂ -> Fe₃O₄

Zn +2 HCl - ZnCl₂ +H₂

CuCl₂ + 2NaOH -> Cu(OH)₂ + 2NaCl

2 Al +3 H₂SO₄ -> Al₂(SO4)₃ +3 H₂

Answer 4

3Fe +2O₂ ------->Fe₃O₄

Zn +2HCl --------> ZnCl₂ +H₂

CuCl₂ - 2NaOH --------> Cu(OH)₂ + 2NaCl

2Al + 3H₂SO₄ -----------> Al₂(SO₄)₃ +3H₂

Answer 5

a, 3Fe+2O2--» Fe304

b, Zn+2HCl--»ZnCl2+H2

c, CuCl2+2NaOH--»Cu(OH)2+2NaCl

đ, 2Al+3H2SO4--»Al2(SO4)3+3H2